Hexy is a simple and lightweight hex dumper written in C++. It allows users to inspect binary files in a clear hex + ASCII format. Non-printable bytes are highlighted in red, and printable characters in green for easy reading.

Hexy is available as a standalone tool on GitHub, or bundled with FoxBox, an educational virtual machine for learning assembly with a custom instruction set called Fennec Assembly. Hexy is especially useful for exploring Fennec Assembly bytecode produced by FoxBox.

• Minimal and fast hex dumper for binary files.
• Prints offsets, hex bytes, and ASCII representation.
• Highlights printable and non-printable bytes using colors.
• Cross-platform: works on Linux, macOS, and Windows.
• Can be used standalone or bundled with FoxBox for inspecting Fennec Assembly bytecode.

You need a C++ compiler (C++20 recommended).

g++ -std=c++20 -Wall -o hexy main.cpp

Or use the included Makefile:

make

• Produces hexy (Linux/macOS) or hexy.exe (Windows).

./hexy <input_file>

Example:

./hexy example.bin

Output:

          00 01 02 03 04 05 06 07 08 09 0a 0b 0c 0d 0e 0f
00000000: 48 65 6c 6c 6f 20 57 6f 72 6c 64 21 0a 31 32 33 Hello World!.123

• ASCII column: printable characters are green, non-printable bytes appear as red ..
• Perfect for inspecting Fennec Assembly bytecode generated by FoxBox.

Hexy comes bundled with FoxBox to make inspecting compiled Fennec Assembly binaries easy.

# Example workflow
foxbox assemble program.fa -o program.fb
hexy program.fb

• Shows the binary content of your Fennec Assembly programs in a human-readable format.

GNU GENERAL PUBLIC LICENSE – see LICENSE for details.